testo 338 – Smoke tester

For diesel engines, the smoke count is an important parameter, not only for evaluating emissions, but also for the correct adjustment of the fuel injection. With the smoke tester testo 338, the determination of degree of blackening is revolutionarily easy; no stationary measurement equipment, no analysis electronics – with just one portable one-hand measuring instrument.

Product benefits:

  • Handy and robust Easily possible to carry to the desired application site
  • Determination of soot concentration (mg/m3) as well as Filter Smoke Number (FSN) or Bosch number
  • Easy one-handed operation
  • Direct analysis and display of measurement values, optional on-site printout of data with Testo fast printer

Broj artikla: 0632 3381.

Whether you are a technician servicing diesel engines, or a manufacturer who needs to provide proof of emission values – determining the smoke count is often part of your job. With the smoke tester testo 338, you are ideally equipped for the determination of the degree of blackening in diesel engines. The easy-to-operate, handy measuring instrument records the soot concentration (mg/m3)  and the Filter Smoke Number (FSN) or Bosch number for you.

  • Smoke counter testo 338
  • including gas sampling probe
  • TopSafe
  • mains unit and instrument case

Measuring range

0 to 70 mg/m³


0.01 mg/m³


< 1.5 mg/m³ (0 to 5 mg/m³) < 1.25 mg/m³ +5 % of mv (5 to 70 mg/m³)